Filter

Abstract

A filter, including a main body part. The main body part includes a heart-proximal end, a plurality of connecting segments, and a first filter mesh connecting between the heart-proximal end and the plurality of connecting segments. An end of the connecting segments that is connected to the first filter mesh is bent towards a central longitudinal axis of the filter to form a bending part. A vertical distance between a proximal end of the bending part and the central longitudinal axis of the filter is less than a vertical distance between a distal end of the bending part and the central longitudinal axis of the filter.

The invention claimed is: 
     
       1. A filter, comprising: a main body part, the main body part comprising a heart-proximal end, a plurality of connecting segments, and a first filter mesh connected between the heart-proximal end and the plurality of connecting segments,
 wherein one end, connected to the first filter mesh, of the plurality of connecting segments is bent towards one side of a longitudinal center axis of the filter to form a bending part, and a vertical distance between the proximal end of the bending part and the longitudinal center axis of the filter is less than a vertical distance between the distal end of the bending part and the longitudinal center axis of the filter; 
 wherein the first filter mesh comprises a plurality of first branch segments, each of the plurality of first branch segments has a distal end away from the heart-proximal end, two adjacent distal ends of the plurality of first branch segments converge to form a distal end of the first filter mesh, and the distal end of the first filter mesh is directly connected to the bending part; 
 wherein the bending part further comprises a first bending segment and a second bending segment which are connected, the first bending segment is connected between the distal end of the first filter mesh and a proximal end of the second bending segment, the first bending segment comprises a straight segment parallel to the longitudinal center axis of the filter, and a vertical distance between the proximal end of the second bending segment and the longitudinal center axis of the filter is less than a vertical distance between a distal end of the second bending segment and the longitudinal center axis of the filter; 
 wherein a ratio of a distance between the proximal end of the bending part and the distal end of the bending part in the direction of the longitudinal center axis of the filter to a distance between both ends of each of the plurality of connecting segments in the direction of the longitudinal center axis of the filter is 1/20-⅗; and 
 wherein the main body part further comprises a heart-distal end and a second filter mesh connected between the heart-distal end and the plurality of the connecting segments. 
 
     
     
       2. The filter according to  claim 1 , wherein the connecting segments further comprising a connecting part connected between the bending part and the second filter mesh. 
     
     
       3. The filter according to  claim 2 , wherein a vertical distance between the distal end of the connecting part and the longitudinal center axis of the filter is not less than the vertical distance between the proximal end of the bending part and the longitudinal center axis of the filter, and the vertical distance between the distal end of the connecting part and the longitudinal center axis of the filter is not greater than the vertical distance between the distal end of the bending part and the longitudinal center axis of the filter. 
     
     
       4. The filter according to  claim 2 , wherein the connecting part is provided with a concave structure. 
     
     
       5. The filter according to  claim 2 , wherein the second filter mesh is provided with a flexible part bent towards one side of the longitudinal center axis of the filter, and a bending strength of the flexible part is lower than a bending strength of a portion of the second filter mesh other than the flexible part. 
     
     
       6. The filter according to  claim 2 , wherein the filter further comprises a recovery hook, the recovery hook being provided on the heart-proximal end or the heart-distal end. 
     
     
       7. The filter according to  claim 1 , wherein the filter further comprises a plurality of support parts connected to the main body part, each of the support parts comprising at least one support. 
     
     
       8. The filter according to  claim 7 , wherein the at least one support comprises a guide segment connected to one of the plurality of connecting segments, and a support segment connected to the guide segment; and the guide segment extends radially outward towards the heart-proximal end, and the support segment extends radially outward towards the heart-proximal end. 
     
     
       9. The filter according to  claim 7 , wherein the filter further comprises a mooring anchor, the mooring anchor being connected to the main body part or the support parts. 
     
     
       10. The filter according to  claim 1 , wherein a ratio of a distance between both ends of the first bending segment in the direction of the longitudinal center axis of the filter to a distance between both ends of the bending part in the direction of the longitudinal center axis of the filter is ⅕-⅗. 
     
     
       11. A filter, comprising: a main body part and a plurality of support parts, the support parts comprising at least one support, the at least one support comprising a guide segment connected to the main body part,
 wherein under a natural release state of the filter, an included angle between a connecting line between both ends of the guide segment and a longitudinal center axis of the filter is 20°-85°, and a ratio of a height of the at least one support in a radial direction of the filter to a maximum distance between the at least one support and the longitudinal center axis of the filter is ⅛-⅓; 
 wherein the main body part comprises a heart-proximal end, a plurality of connecting segments, and a first filter mesh connected between the heart-proximal end and the plurality of connecting segments, 
 wherein one end, connected to the first filter mesh, of the plurality of connecting segments is bent towards one side of the longitudinal center axis of the filter to form a bending part, and a vertical distance between the proximal end of the bending part and the longitudinal center axis of the filter is less than a vertical distance between the distal end of the bending part and the longitudinal center axis of the filter, 
 wherein the first filter mesh comprises a plurality of first branch segments, each of the plurality of first branch segments has a distal end away from the heart-proximal end, two adjacent distal ends of the plurality of first branch segments converge to form a distal end of the first filter mesh, and the distal end of the first filter mesh is directly connected to the bending part; 
 wherein the bending part further comprises a first bending segment and a second bending segment which are connected, the first bending segment is connected between the distal end of the first filter mesh and a proximal end of the second bending segment, the first bending segment comprises a straight segment parallel to the longitudinal center axis of the filter, and a vertical distance between the proximal end of the second bending segment and the longitudinal center axis of the filter is less than a vertical distance between a distal end of the second bending segment and the longitudinal center axis of the filter; 
 wherein a ratio of a distance between the proximal end of the bending part and the distal end of the bending part in the direction of the longitudinal center axis of the filter to a distance between both ends of each of the plurality of connecting segments in the direction of the longitudinal center axis of the filter is 1/20-⅗; and 
 wherein the main body part further comprises a heart-distal end and a second filter mesh connected between the heart-distal end and the plurality of the connecting segments. 
 
     
     
       12. The filter according to  claim 11 , wherein the filter further comprises a recovery hook, the guide segment extends radially outward toward a side away from the recovery hook, and the guide segment has a support segment connected thereto. 
     
     
       13. The filter according to  claim 12 , wherein the support segment is a circular arc structure, and the support segment is connected to an end of the guide segment that is away from the recovery hook. 
     
     
       14. The filter according to  claim 13 , wherein the at least one support further comprises a spherical part connected at an end of a lower folding segment, or the spherical part is connected at an end of the support segment that is away from the guide segment. 
     
     
       15. The filter of  claim 12 , wherein the main body part further comprises a connector connected between the heart-proximal end and the heart-distal end, and the recovery hook is connected to the heart-proximal end or the heart-distal end. 
     
     
       16. The filter according to  claim 15 , wherein the connector comprises the first filter mesh connected to the heart-proximal end, the second filter mesh connected to the heart-distal end, and the plurality of connecting segments connected between the first filter mesh and the second filter mesh, the support parts being connected to the connecting segments. 
     
     
       17. The filter according to  claim 11 , wherein a ratio of a distance between both ends of the first bending segment in the direction of the longitudinal center axis of the filter to a distance between both ends of the bending part in the direction of the longitudinal center axis of the filter is ⅕-⅗. 
     
     
       18. A filter, comprising: a main body part, the main body part comprising a heart-proximal end, a plurality of connecting segments, and a first filter mesh connected between the heart-proximal end and the plurality of connecting segments,
 wherein one end, connected to the first filter mesh, of the plurality of connecting segments is bent towards one side of a longitudinal center axis of the filter to form a bending part, and a vertical distance between the proximal end of the bending part and the longitudinal center axis of the filter is less than a vertical distance between the distal end of the bending part and the longitudinal center axis of the filter; 
 wherein the first filter mesh comprises a plurality of first branch segments, each of the plurality of first branch segments has a distal end away from the heart-proximal end, two adjacent distal ends of the plurality of first branch segments converge to form a distal end of the first filter mesh, and the distal end of the first filter mesh is directly connected to the bending part; 
 wherein the bending part further comprises a first bending segment and a second bending segment which are connected, the first bending segment is connected between the distal end of the first filter mesh and a proximal end of the second bending segment, the first bending segment consists of a straight segment parallel to the longitudinal center axis of the filter, and a vertical distance between the proximal end of the second bending segment and the longitudinal center axis of the filter is less than a vertical distance between a distal end of the second bending segment and the longitudinal center axis of the filter; and 
 wherein the first bending segment is directly connected to the distal end of the first filter mesh.